The decay instability of Langmuir waves in the non-neutral electron plasma column

1999 ◽  
Author(s):  
H. Higaki
Keyword(s):  
Plasma Column ◽  
Electron Plasma ◽  
Langmuir Waves ◽  
Decay Instability

Nonlinear wave interactions in two-electron-temperature plasmas

1994 ◽  
Vol 51 (3) ◽  
pp. 423-432 ◽  
Author(s):  
A. Hanssen ◽  
H. L. Pécseli ◽  
L. Stenflo ◽  
J. Trulsen
Keyword(s):  
Decay Channel ◽  
Plasma Waves ◽  
Electron Plasma ◽  
Dynamical Equations ◽  
Langmuir Waves ◽  
Ionospheric Heating ◽  
Weakly Nonlinear ◽  
Electron Distributions ◽  
Temperature Component ◽  
Electron Acoustic

Dynamical equations are derived for the evolution of weakly nonlinear electron plasma waves when the electron distributions are characterized by more than one temperature component. The presence of electron-acoustic modes in multi- temperature plasmas opens a new decay channel. By considering an explicit example, it is demonstrated that these distributions imply significant modifications of the standard models for the decay spectrum of electron plasma waves. In particular, long-wavelength Langmuir waves can decay to shorter wavelengths. The results can have implications for ionospheric heating experiments.

Finite length thermal equilibria of a pure electron plasma column

1979 ◽  
Vol 22 (2) ◽  
pp. 278 ◽  
Author(s):  
S. A. Prasad ◽  
T. M. O’Neil
Keyword(s):  
Finite Length ◽  
Plasma Column ◽  
Electron Plasma

Nonlinear Landau damping of a broad-band spectrum of electron plasma waves in a bounded plasma

1976 ◽  
Vol 15 (3) ◽  
pp. 371-380 ◽  
Author(s):  
G. Matthieussent
Keyword(s):  
Boundary Value Problem ◽  
Plasma Column ◽  
Broad Band ◽  
Plasma Waves ◽  
Electron Plasma ◽  
Landau Damping ◽  
Band Spectrum ◽  
Bounded Plasma ◽  
Nonlinear Landau Damping ◽  
Geometrical Effects

The nonlinear Landau damping of a broad-band spectrum of electron plasma waves propagating in a plasma column is considered.Finite geometrical effects inherent to the boundary value problem are taken into account. It is shown that nonlinear Landau damping of such a spectrum can be easily observed on a plasma column with a density of the order of 2 × 108 particles cm−3 and an electron temperature of about 3eV.

Transverse electromagnetic modes in a hot cylindrical plasma column

1994 ◽  
Vol 52 (3) ◽  
pp. 471-481
Author(s):  
M. Shoucri
Keyword(s):  
Plasma Column ◽  
Cyclotron Frequency ◽  
Hydrogen Plasma ◽  
Electron Plasma ◽  
Dielectric Tensor ◽  
Cylindrical Plasma ◽  
Hot Plasma ◽  
Transverse Electromagnetic ◽  
Special Case ◽  
Cylindrical Plasma Column

We derive the dielectric tensor of a hot plasma by including the smallgyroradius corrections up to the first harmonic (ω ≈ 2ωcα). We show that these corrections introduce radial wavenumbers associated with transverse electromagnetic modes (TEM). The special case of a cylindrical plasma column is discussed for a hydrogen plasma at the ion-cyclotron frequency and for an electron plasma at the electron-cyclotron frequency and its first harmonic.

Decay instability of an electron plasma wave in a dusty plasma

1996 ◽  
Vol 53 (3) ◽  
pp. 2740-2746 ◽  
Author(s):  
M. R. Amin ◽  
T. Ferdous ◽  
M. Salimullah
Keyword(s):  
Dusty Plasma ◽  
Plasma Wave ◽  
Electron Plasma ◽  
Electron Plasma Wave ◽  
Decay Instability

scholarly journals Electron Beams and Langmuir Turbulence in Solar Type III Radio Bursts Observed in the Interplanetary Medium

1990 ◽  
Vol 142 ◽  
pp. 467-481
Author(s):  
R. P. Lin
Keyword(s):  
Interplanetary Medium ◽  
Electron Beams ◽  
Low Frequency ◽  
Langmuir Wave ◽  
Plasma Waves ◽  
Wave Number ◽  
Langmuir Waves ◽  
Decay Instability ◽  
Type Iii ◽  
Solar Type

The ISEE-3 spacecraft has provided in situ observations of electron beams, plasma waves, and associated solar type III radio emission in the interplanetary medium near 1 AU. These observations show that electron beams are formed by the faster electrons arriving before the slower ones, following an impulsive injection at the Sun. The resulting bump-on-tail in the reduced one-dimensional distribution function, f(v||), is unstable to the growth of electrostatic electron plasma (Langmuir) waves. The Langmuir waves are observed to be highly impulsive in nature. The onset and temporal variations of the observed plasma waves are in good qualitative agreement with the wave growth expected from the evolution of measured f(v||). However, far higher Langmuir wave intensities are predicted than are detected. In addition, the lack of obvious plateauing of the bump-on-tail suggests that the waves have been removed from resonance with the beam electrons by some wave-wave interaction. Bursts of low frequency, 30–300 Hz (in the spacecraft frame) waves are often found coincident in time with the most intense spikes of the Langmuir waves. These low-frequency waves appear to be long-wavelength ion acoustic waves, with wave number approximately equal to the beam-resonant Langmuir wave number. The observations suggest several possible interpretations: modulational instability, electrostatic decay instability, and electromagnetic decay instability; but none of these are fully consistent with the observations. Microstructures, too short in duration to be resolved by present experiments, have been invoked as an explanation of the phenomenon. Experiments are currently being developed to study these processes using fast wave-particle correlation techniques.

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